Boring and screw-driving tool



May 5, 1925. 1,536,941

A. E. SILLER BORING AND SCREW DRIVING TOOL Filed May '6, 1924 INVENTORATTORNEY Patented May 5, 1925.

'ALIONSO E. SILLEIQOF MONTEBREY, MEXICO;

' BORING Ann SCREW-DRIVING moon.

Application filed ma 6,

To all whom it mdytoncevm: I p I Be itknown that 1, ALFONSO E. SILLER,citlzen of Mexico, residing at Monterrey, N.

L., Mexicoyhave invented certain new and v useful Improvements in Boringand Screw- Diiving Tools, of which-the following 15 a specification.

This invention relates to a hand tool for use in boring holes,settingscrews, or the like, the invention having more particularreference to an implement of the type in' WlllCll a large gear has acrank handle attached thereto and engages a pinion to which the tool orblll'lS' fixed, the invention having for an ob ect the provision of anovel tool of this sort provided with a handle to which the bit may belocked when it is desired to apply extra turning force directly to thebit through the medium of the handle.

r 1 further comprehension of the inven tion, and of the objects andadvantages thereof, reference will'be had to the followmg descriptionand accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

Fig. 1 of the drawing is a side elevation of my improved tool. I i

Fig. 21s a longitudinal sectional view, Fig. 3 is a transverse sectionalview taken on the line 3-3 of 1* 1g. 2.

- Fig. 4 is a like view taken on the line 4.'%

of Fig. 2. i

Fig. 5 is a S'ldO elevation at right angles to Fig. 1.

Referring now to the drawing, my mi-- proved tool comprises an elongatedbody it) of generally cylindrical shape which is formed with a recess11. entered therein from one side a short distance from its forward end.In this recess is located a bevel pinion 12 which has a hub projection12 seating in a suitable socket in the front wall of the recess. 11.This hub 12 is formed on its forward end with a square socket 14 toreceive the squared rear ends of the bit 15. To retain the latter withitsrear GIICl'lH engagement with the hub 12 the shank of the bit isformed with a cii'cun'iferential groove 16 into which projects screw 17threaded through the side of the member 10, the shank of the bit beingaccommodated in an axial boring in the member which extends forwardlyfrom the recess 11.

ll leshing with the pinion 12 is a gear20 which is mounted on a screw 21inserted into 1924. Serial No. 711,306.

fixed thereon a crank handle 22 provided with a knob 23.' By rotatingthis gear 20 the bit 15 of the tool willbe causedto revolve atrelatively higher speed.

In order to enable a high degree of-torque to be applied to the bit 15when'desired, T. preferably provide means whereby the lat-- ter may belocked to the member 10 which then serves as the forward portion of ahandle in which the bit is fixed. As here shown the member 10 has asquare passage 25 extending rearwardly therethrough from the recess 11and in this passage is freely engaged a square rod 26 which iis adaptedto engage when desired in a square socket 2'7 vin the rear face of thepinion 12. This rod 26 is fixed at its'rear end to a flanged cap 28which freely encloses the rear end of the member; At its forward endthis cap bears against a ring-nut 30 which is screwed on a shortthreaded portion 10 and which may have a swivel engagement with the cap,that is to say an engagement which permits the nut to turn relatively tothe cap but makes the two move axially in unison, this beinghere-accomplished by means of a ferrule 31 fixed on the end of the capand having an By screwing the I I the socket 27 so that direct movementis transmitted from the cap 28 to the bit 15.

In Fig. 5 I have shown the handle portion of the tool as in the form ofa separate ele ment 28" which is inserted into the rear end of themember 10 and which is held in place by means of the screws 35, whichare passed througl'i. the rear end of the member 10 and engage insuitable threaded sockets in the handle. i i

lVhile I have illustrated and described a preferred embodiment of myinvention it is to be understood that I do not limit myself to theprecise construction here shown and that. various changes andmodifications might be made therein-without departing from the spiritand scope of the invention as defined. in the appended claims.

Having thus described my invention, what I claiin asnew and desire toprotect by Letters Patent follows v 1. 'A tool of the typedescribedcomprising an elongated body member formed between of the United Statesis as one side thereof, a pinion seated in said recess a gear mounted onthe side of the said body member and meshing with said pinion, a handlefixed to said gear, a square rod extending rearwardly through aCOIUPlGH'KD- lary passage in said body member from said recess. aflanged cap seated on the rear end of said body member to which said rodis lined at its rear end, and a ring-nut threaded on the said bodymember against which the forward end of the said cap bears.

A tool of the type described comprising an elongated body nember "formedbetween. its ends with a recess entered thereinto from one side thereof,a pinion seated in said recess, a gear mounted on the side of the bodymember and meshing with said pinion, a handle fixed to said gear, asquare rod extending rearwardly through a complementary passage in saidbody member from said recess a flanged cap seated on the rear end ofsaid body member to which said rod is fixed at its rear end, and aring-nut threaded on the said body member against which the forward endof the said cap bears, paid cap having a swivel connection with saidnut.

In testimony whereof I have afiixed my signature.

ALFONSO E. SILLER.

